1 //===-- ScheduleDAGPrinter.cpp - Implement ScheduleDAG::viewGraph() -------===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This implements the ScheduleDAG::viewGraph method.
12 //===----------------------------------------------------------------------===//
14 #include "llvm/ADT/StringExtras.h"
15 #include "llvm/CodeGen/MachineConstantPool.h"
16 #include "llvm/CodeGen/MachineFunction.h"
17 #include "llvm/CodeGen/ScheduleDAG.h"
18 #include "llvm/CodeGen/TargetRegisterInfo.h"
19 #include "llvm/IR/Constants.h"
20 #include "llvm/Support/Debug.h"
21 #include "llvm/Support/GraphWriter.h"
22 #include "llvm/Support/raw_ostream.h"
27 struct DOTGraphTraits<ScheduleDAG*> : public DefaultDOTGraphTraits {
29 DOTGraphTraits (bool isSimple=false) : DefaultDOTGraphTraits(isSimple) {}
31 static std::string getGraphName(const ScheduleDAG *G) {
32 return G->MF.getName();
35 static bool renderGraphFromBottomUp() {
39 static bool isNodeHidden(const SUnit *Node) {
40 return (Node->NumPreds > 10 || Node->NumSuccs > 10);
43 static std::string getNodeIdentifierLabel(const SUnit *Node,
44 const ScheduleDAG *Graph) {
46 raw_string_ostream OS(R);
47 OS << static_cast<const void *>(Node);
51 /// If you want to override the dot attributes printed for a particular
52 /// edge, override this method.
53 static std::string getEdgeAttributes(const SUnit *Node,
55 const ScheduleDAG *Graph) {
56 if (EI.isArtificialDep())
57 return "color=cyan,style=dashed";
59 return "color=blue,style=dashed";
64 std::string getNodeLabel(const SUnit *Node, const ScheduleDAG *Graph);
65 static std::string getNodeAttributes(const SUnit *N,
66 const ScheduleDAG *Graph) {
67 return "shape=Mrecord";
70 static void addCustomGraphFeatures(ScheduleDAG *G,
71 GraphWriter<ScheduleDAG*> &GW) {
72 return G->addCustomGraphFeatures(GW);
77 std::string DOTGraphTraits<ScheduleDAG*>::getNodeLabel(const SUnit *SU,
78 const ScheduleDAG *G) {
79 return G->getGraphNodeLabel(SU);
82 /// viewGraph - Pop up a ghostview window with the reachable parts of the DAG
83 /// rendered using 'dot'.
85 void ScheduleDAG::viewGraph(const Twine &Name, const Twine &Title) {
86 // This code is only for debugging!
88 ViewGraph(this, Name, false, Title);
90 errs() << "ScheduleDAG::viewGraph is only available in debug builds on "
91 << "systems with Graphviz or gv!\n";
95 /// Out-of-line implementation with no arguments is handy for gdb.
96 void ScheduleDAG::viewGraph() {
97 viewGraph(getDAGName(), "Scheduling-Units Graph for " + getDAGName());